Would anyone like to share their opinion on Moog Problem Solver parts v. AC Delco Professional? I just replaced my steering gear and pitman arm and used ACD pro. I took it in for a front wheel alignment and they said I need upper and lower ball joints replaced first or the alignment is pointless. I told them I'd do it myself (I thought they looked suspect when I was dealing with the gear/pitman). I've never replaced ball joints before... so hoping it's not terribly difficult.